full-disclosure - Broadcast storm in my network/ any ideas

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Date: Thu Dec 22 17:16:57 2005
From: wilder_jeff at msn.com (wilder_jeff Wilder)
Subject: Broadcast storm in my network/ any ideas

All,

I have a Windows 2000 terminal server that is consistantly sending out 
broadcasts to 255.255.255.255:111... below is a capture from a snort box I 
have running. In the last 18 hours I have had about 2000 packets from this 
box to this address about every 30 seconds.  Snort reports the signature as 
a RPC portmap proxy attempt UDP.  I have not been able to find much 
information on this event.  I have run a current AV scan against the box, it 
did come up clean.  Can anyone give me a bit of direction as to these 
events?

-Jeff

RPC portmap proxy attempt UDP  10.74.32.31:3300/udp    
255.255.255.255:111/udp 07:50:35
RPC portmap proxy attempt UDP  10.74.32.31:3291/udp    
255.255.255.255:111/udp 07:50:05